Nozzle unit for injection valve of motor vehicle, has nozzle needle whose closing surface is coupled with seat surface in closing position of needle, where surface prevents fluid flow via hole and releases flow outside position

摘要

The unit has nozzle needles (4, 5) axially moved in a nozzle needle recess, and a seat surface designed in a concave manner. A cone shaped or convex closing surface of the nozzle needle is mechanically coupled with the seat surface in the closing position of the nozzle needle. The closing surface prevents fluid flow via the injection hole and releases the fluid flow outside the closing position of the needle. An independent claim is also included for a valve with injector housing, in which a nozzle component is arranged.